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Error Recovery in Bottom-Up

There are different schemes. The following is implemented in JavaCUP, yacc, bison.
Introduce a special symbol error.
The author of a parser can use error in productions.
For instance:
$\begin{program} Statement~\==~\=~Assignment \\ ~~~~~~~~\\ gt$\vert$~\\ gt~IfStat... ...~~~\\ gt$\vert$~\\ gt~error~'';'' \\ ~~~~~~~~~~~~~~~~~~~~~~~~\\ gt;\end{program}$

Christoph Zenger
4/6/2000